TYPHIDOT Rapid IgG/IgM (Combo) Version2

(A rapid test for detection of Typhoid fever)

INTENDED USE WARNINGS AND PRECAUTIONS

TYPHIDOT Rapid IgG/IgM (Combo) is an immunochromatographic 1. For professional in vitro diagnostic use only.
assay designed for the qualitative detection and differentiation of specific 2. This product insert must be strictly followed in order to produce
IgM and IgG antibodies against specific Salmonella typhi OMP antigen in accurate test results.
human serum or plasma. It is intended to be used as in vitro diagnostic of 3. Keep the test device sealed until use. Once the device pouch has
typhoid fever. The results obtained should not be the sole determinant for been opened, the test device must be used immediately.
clinical decision. 4. Do not use device if the sealed pouch is visibly damaged.
5. Do not use kit beyond the expiration date.
SUMMARY AND EXPLANATION OF THE TEST 6. Handle all specimens as being potentially infectious. Dispose all
materials that come in contact with the specimen as infectious waste.
Typhoid fever is an infectious disease caused by a bacterium, Salmonella 7. Wipe any spills of sera or plasma promptly with 1% sodium hypochlorite
typhi. It continues to be a major health problem especially in the Asia solution.
Pacific region, the Indian subcontinent, Central Asia, Africa and South 8. Do not reuse test device.
America1. Definitive clinical diagnosis of typhoid is unreliable because
typhoid fever symptoms mimic other diseases with fever that are common
in this part of the world. Clinical presentations vary tremendously among
STORAGE AND STABILITY
patients and cover a wide spectrum, hence the need for a good laboratory
test2,3. In addition, an accurate diagnosis of typhoid at an early stage is
Store at 4-30oC, do not freeze. Keep the test device sealed until used.
important not only for an aetiological diagnosis for the patient but also to
Keep away from direct sunlight, moisture and heat.
identify individuals that might serve as a source of infection3. Thus all
cases of fever should be tested for typhoid and a rapid laboratory tests will
be required.
SAMPLE COLLECTION AND PREPARATION
TYPHIDOT Rapid IgG/IgM (Combo) offers many advantages which fulfill
the requirement of typhoid diagnosis. These advantages includes: 1. Handle all specimens as being potentially infectious. Dispose all
materials that come in contact with the specimen as infectious waste.
• early and specific diagnosis of typhoid fever 2. Specimen should be collected aseptically by venipuncture according
• fast, simple and reliable to the standardized methods. The use of grossly lipemic or turbid
• simple to perform and no additional sample preparation required samples should be avoided. Plasma or serum is separated from the
• no special equipment is needed whole blood using standard procedures.
• results are easy to interpret 3. If serum or plasma specimens cannot be tested immediately, they
• minimal sample volume used should be refrigerated at 2 to 8°C. For storage periods longer than
three (3) days, freeze the specimen at -20°C or below.

PRINCIPLE OF THE TEST

The TYPHIDOT Rapid IgG/IgM (Combo) is an indirect solid-phase ASSAY PROCEDURE

immunochromatographic assay. The specific S. typhi OMP antigen is
immobilized onto cellulose nitrate membrane as test lines. When the test
sample is added to the sample pad, it migrates upwards. If anti-S.typhi
IgG and IgM antibodies are present in the test sample (serum or plasma),
they will react with colloidal gold-anti-human IgG or gold-anti-human IgM
to form a complex. The complex will continue to move on the cellulose
C = Control Line
nitrate membrane and then captured at the test window zone by the These lines are not seen
immobilized specific S. typhi OMP antigen, giving a pink-purplish coloured before the cassette is used.
band. The control line contains rabbit anti-mouse IgG antibody which T = Test line
binds with the gold conjugated mouse anti-human IgG or mouse anti-
human IgM antibodies. The control band serves as an indication of proper
migration plus reagent control.
Sample well

PERFORMANCE CHARACTERISTICS

Sensitivity and specificity for TYPHIDOT Rapid IgG/IgM (Combo) are 1. Bring test cassette and chase buffer to room temperature (if
90% and 80% respectively. precipitates are noted in the chase buffer reagent, shake the bottle
vigorously and allow to warm up further).
2. Gently tear open the pouch and remove the test cassette.
REAGENTS AND MATERIALS SUPPLIED
3. Label the test cassette with the sample name.
4. Add 45 µl serum/ plasma to each sample well; making sure that there
1. TYPHIDOT Rapid IgG/IgM (Combo) cassette (25 pieces packed in
is no air bubbles.
individually sealed aluminium pouch)
5. Add 1 drop of buffer to each sample well. Serum/ plasma will start
2. One bottle of Chase buffer
wicking up the membrane. The cassette may be tapped gently on the
3. One copy of instruction manual (product insert)
table to facilitate the sample to flow up the membrane.
6. Read result after 20 minutes.
MATERIALS REQUIRED BUT NOT SUPPLIED

1. Sample collection and preparation device and equipment

2. Sample dispensing apparatus such as pipettes
3. Clock or timer

TF-RD0202_2014-04
QUALITY CONTROL LIMITATION OF THE TEST

1. Positive and negative controls are not included and are optional. 1. This product is designed for use with human serum and plasma only.
2. If the control line at position C does not become visible, the test is
invalid. Positive samples will have additional coloured band at 2. The test is a qualitative assay and is not for quantitative
position T. determination of antibodies concentration levels. The intensity of the
band does not have linear correlation with the antibody titer of the
specimen.
3. The results obtained should only be interpreted in conjunction with
other diagnostic results and clinical information.
INTEPRETATION OF RESULTS
4. Due to the limitations of the test, for cases where interpretation of
result seems difficult, we strongly recommend repeating the test
using TYPHIDOT 1 hour or TYPHIDOT 3 hours.
Note: TYPHIDOT 1 hour or TYPHIDOT 3 hours are Dot EIA assay
designed for the qualitative detection of specific IgM and IgG
antibodies against a specific outer membrane antigen of
Salmonella typhi in human serum.

WARRANTY AND LIMITED LIABILITY

The performance characteristics stated were obtained by using the assay

Positive for anti-S Positive for anti-S Positive for anti- procedure in this insert. Failure to follow the assay procedure may derive
typhi IgG S typhi IgM inaccurate results. In such event, the manufacturer disclaims all
typhi IgG & IgM
warranties expressed, implied or statutory, including the implied warranty
of merchantability and the fitness for use.
The manufacturer will not be liable for any damage caused by misuse,
improper handling and storage, non-compliance with warnings and
procedures, damage caused by events occurring after the product is
released, failure to ensure the product is in proper condition before use, or
any warranty given by independent distributor.

REFERENCES

1. Ivanoff B, Levine MM, Lambert PH (1994). Vaccination against

typhoid fever: present status. Bull World Hlth Org 72: 957-71.
2. Ismail A, Ong KH, Zainoodin SAK (1991). Demonstration of an
antigen specific for Salmonella typhi. Biochem Biophy Res Com 181:
301-5.
Negative for anti-S Invalid
3. Levine MM, Grados O, Gilman RH, Woodward WE, Solis-Plaza R,
typhi IgG & IgM Waldman W (1978). Diagnostic value of the Widal test in areas
endemic for typhoid fever. Am J Trop Med Hyg 27: 785-800.
4. Bokkenheuser V (1964). Detection of typhoid carriers. Am J Pub Hlth
54: 477-85.

1. Positive for Salmonella typhi specific antibodies: ORDER INFORMATION

Coloured bands appear at the Control line (C) and Test lines (T).
Product Code Description Packing Size
2. Negative for Salmonella typhi specific antibodies:
Only Control line (C) is visible. TF-RD0202 TYPHIDOT Rapid IgG/IgM 25 tests / kit
(Combo) Version2
3. Invalid: Control line (C) is absent. If this occurs, the assay
should be repeated using a new test cassette.

MANUFACTURER
Reszon Diagnostics International Sdn. Bhd.
Revongen Corporation Center, No.12A, Jalan TP5, Taman
Perindustrian UEP, 47600 Subang Jaya, Selangor, Malaysia.
Tel : +603-8925 1603
Fax : +603-8925 1637
Email : info@reszonics.com
Website : www.reszonics.com

AUTHORIZED EUROPEAN REPRESENTATIVE

Obelis s.a.
Bld. General Wahis 53, 1030 Brussels, Belgium.
Tel : +32(0)2-732 5954
Fax : +32(0)2-732 6003
Email : mail@obelis.com

TF-RD0202_2014-04